Air purifier

An Air Purifier is a device which aims to free air from contaminants. Various techniques are used to accomplish this which includes filters, adsorbents like charcoal, and electrostatic charges. People who suffer from asthma, allergies, and other respitory problems have the most to benefit.

There is some controversy surrounding the claims of certain companies, specifically involving ionic air purifiers. This is partly due to the questionable effects of negative ion generators which many skeptics question the legitimacy of. Additionally the ozone generating properties of these machines are known to have negative side effects.

On the opposite end of the spectrum are air purifiers with HEPA air filters. The DOE has rigid requirements manufactures must pass to meet HEPA requirements. Consumers should be aware of products that say "HEPA-type." These have failed to meet HEPA requirements so.

External links

• DOE HEPA Filter Standards HEPA filter specifications for DOE contractors
• Air Purifiers Consumer guide to choosing the right air purification options for your home.